| Anay+J Limited | Wholesale & retail | 2018 |
| Anayaan Ltd | Wholesale & retail | 2023 |
| Anbi Limited | Hospitality | 2018 |
| Anbitrack Limited | Transport & logistics | 2024 |
| Anchor Business Solutions Limited | Professional & scientific | 2017 |
| Anchor Dining Limited | Hospitality | 2020 |
| Ancient Gates Ltd | Wholesale & retail | 2025 |
| Anco Care Services Limited | Health & social care | 2015 |
| Anco Recruitment Services Ltd | Administrative & support | 2025 |
| AND & Son’S Ltd | Wholesale & retail | 2026 |
| AND More Ltd | Other services | 2015 |
| AND More Than Ltd | Other services | 2023 |
| AND World Limited | Real estate | 2019 |
| Anders George Consulting Ltd | Administrative & support | 2024 |
| Anderson Consulting Limited | Professional & scientific | 2017 |
| Anderson Creative Limited | Professional & scientific | 2008 |
| Anderson FOX Limited | Professional & scientific | 2024 |
| Anderson Greer Limited | Professional & scientific | 2023 |
| Anderton Management a Ltd | Wholesale & retail | 2024 |
| Anderton Management Ltd | Real estate | 2015 |
| Anderton Tiger LLP | | 2002 |
| Anderwise Limited | Financial services | 2024 |
| Andquirky LLP | | 2020 |
| Andras Services Ltd | Transport & logistics | 2019 |
| Andrea Holdings Ltd | Real estate | 2018 |
| Andreea Choice Ltd | Wholesale & retail | 2021 |
| Andreea's Best Food Ltd | Manufacturing | 2020 |
| Andrei's Swift Delivery Ltd | Transport & logistics | 2024 |
| Andreioanafuture Ltd | Transport & logistics | 2022 |
| Andrew Barton Consulting Limited | Professional & scientific | 2016 |
| Andrew Courier Solution Ltd | Transport & logistics | 2020 |
| Andrew JK Autos Ltd | Wholesale & retail | 2023 |
| Andrew Jolly Ltd | Real estate | 2026 |
| Andrew Jukes Photography Ltd | Professional & scientific | 2017 |
| Andrew RIX Ltd. | Information & communication | 2005 |
| Andrew Voller Lighting Design Limited | Information & communication | 2010 |
| ANDREW3615 Ltd | Wholesale & retail | 2026 |
| Andrewdale Ltd | Health & social care | 2014 |
| Andrewdent Ltd | Health & social care | 2022 |
| Andromeda Fasteners Limited | Wholesale & retail | 2025 |
| Andrzej Trans Ltd | Transport & logistics | 2024 |
| Andscapes MK Ltd | Construction | 2026 |
| Andvee Limited | Health & social care | 2013 |
| Andy OIL Auto Services Limited | Wholesale & retail | 2004 |
| Andy Peat Associates Limited | Administrative & support | 1997 |
| Andy Simmonds Aerials Limited | Construction | 2005 |
| Andy Taylor Consulting Limited | Information & communication | 2020 |
| Anelixi Career Coaching Ltd | Administrative & support | 2023 |
| Anemails Ltd | Manufacturing | 2024 |
| Anesio Ltd | Wholesale & retail | 2025 |
| Aneto Digital Services Ltd | Information & communication | 2013 |
| Anewa Ltd | Professional & scientific | 2025 |
| Anez 1962 Limited | Extraterritorial | 2014 |
| Ange Private Ltd | Wholesale & retail | 2025 |
| Angel ADV Logistics Ltd | Transport & logistics | 2026 |
| Angel Balloon Artistry & Events Limited | Administrative & support | 2025 |
| Angel Films Two Limited | Information & communication | 2010 |
| Angel Gems Limited | Extraterritorial | 2009 |
| Angel Health & Care Ltd | Health & social care | 2025 |
| Angel Marketing (UK) Ltd | Information & communication | 2013 |
| Angel Refrigeration Ltd | Wholesale & retail | 2008 |
| Angel Serve Limited | Administrative & support | 2016 |
| Angel Tuning Ltd | Wholesale & retail | 2008 |
| Angelis Creative Limited | Professional & scientific | 2013 |
| Angelo Martuccio Barbering Ltd | Other services | 2023 |
| Angels Trending Ltd | Wholesale & retail | 2022 |
| ANGELS24 Limited | Health & social care | 2012 |
| Angel’S Drive Limited | Financial services | 2023 |
| Angerona Limited | Real estate | 2014 |
| Anglia Heat Pumps Ltd | Construction | 2021 |
| Anglo Siam Limited | Hospitality | 2025 |
| Angularis General Services Ltd | Administrative & support | 2026 |
| Angus Knight (UK) Limited | Professional & scientific | 2023 |
| ANI Properties Ltd | Real estate | 2019 |
| ANI Taste of Motherland Ltd | Hospitality | 2024 |
| Anikethana Milton Keynes CIC | Health & social care | 2025 |
| Anil Estates Limited | Real estate | 2005 |
| Anil Tailor Limited | Health & social care | 2010 |
| Animangapop Limited | Administrative & support | 2022 |
| Anion Marketing Limited | Professional & scientific | 2013 |
| Anita Quansah London Limited | Wholesale & retail | 2011 |
| Anita UK Limited | Wholesale & retail | 1994 |
| Anita's Beauty Centre Ltd | Other services | 2011 |
| Anivishon Limited | Real estate | 2017 |
| Anka Consultancy Services Ltd | Wholesale & retail | 2020 |
| Anka Enterprises Ltd | Wholesale & retail | 2020 |
| Ankk Ltd | Real estate | 2020 |
| Ankk Unit 113 the Prestige Liverpool Ltd | Real estate | 2023 |
| Ankoma Ltd | Professional & scientific | 2017 |
| ANL Logistic Ltd | Transport & logistics | 2012 |
| ANM Utilities Services Ltd | Construction | 2023 |
| ANN Care Services Ltd | Health & social care | 2016 |
| Anna Clean MK Ltd | Administrative & support | 2024 |
| Anna Jones SLT Ltd | Health & social care | 2023 |
| Anna MK Clean Ltd | Administrative & support | 2023 |
| Annaghmore Sound Limited | Information & communication | 2019 |
| Annagreth Brem Limited | Health & social care | 2026 |
| Annalise Care Recruitment Ltd | Health & social care | 2022 |
| Annam Foods International Limited | Wholesale & retail | 2024 |
| Annapoorna Foods PVT Limited | Hospitality | 2026 |